APPARATUS FOR MELTING METAL BY ELECTRON BEAMS AND PROCESS FOR PRODUCING HIGH-MELTING METAL INGOT USING THIS APPARATUS

Title:

APPARATUS FOR MELTING METAL BY ELECTRON BEAMS AND PROCESS FOR PRODUCING HIGH-MELTING METAL INGOT USING THIS APPARATUS

Document Type and Number:

WIPO Patent Application WO/2006/080269

Kind Code:

A1

Abstract:

This invention provides an electron beam melting apparatus and a melting method that, in producing an ingot by dissolving a metal with an electron beam, can suppress the occurrence of new impurities in the ingot production, are less likely to again cause inclusion of once evaporated impurities from a melt pool within a hearth or a mold, and can be improved in operating rate. The electron beam melting apparatus for melting a high-melting metal comprises a raw material feed part for feeding a raw material, a raw material melting part, which is continued from the raw material feed part and, at the same time, is defined by a furnace wall and a ceiling wall, and comprises at least a hearth, a water cooling mold and an electron gun, and an exhaust part continued from the raw material melting part. In this electron beam melting apparatus, at least one of the furnace wall and the ceiling wall is lined with titanium or stainless steel, and, in addition, a plurality of fin-shaped members formed of titanium or stainless steel is provided in the ceiling wall. A lining, which can be attached and detached, is provided on the inner face of the electron beam melting apparatus.

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Inventors:

SHIRAKI TAKESHI (JP)
HATTA YOSHIHIRO (JP)
YAMAMOTO NORIO (JP)

Application Number:

PCT/JP2006/300944

Publication Date:

August 03, 2006

Filing Date:

January 23, 2006

Export Citation:

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Assignee:

TOHO TITANIUM CO LTD (JP)
SHIRAKI TAKESHI (JP)
HATTA YOSHIHIRO (JP)
YAMAMOTO NORIO (JP)

International Classes:

F27B17/00; F27B3/10

Foreign References:

JPH0313092U	1991-02-08
JPS62176667A	1987-08-03

Other References:

See also references of EP 1845325A4
None

Attorney, Agent or Firm:

Suenari, Mikio (6-13 Kyobashi 1-chome, Chuo-k, Tokyo 31, JP)

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